Alcohol absorbed polyalphaolefin drag reducing agents
View Patent ↗A composition including an alcohol absorbed polyalphaolefin that functions as a drag reducing agent and a process for the preparation of the drag reducing agent are disclosed. The process includes the steps of contacting alpha olefin monomers with at least one catalyst in a reactant mixture to form a polyalphaolefin. The polyalphaolefin is then contacted with at least one water insoluble alcohol for a period of time to provide an alcohol absorbed polyalphaolefin that is used as an improved drag reducing agent. Processes for reducing drag in a conduit are also disclosed.
1. A process for forming a drag reducing agent, the process comprising:
contacting an alpha olefin monomer with at least one catalyst in a reactant mixture;
polymerizing the alpha olefin monomer, wherein during the polymerization at least a portion of the alpha olefin monomer polymerize in the reactant mixture to provide an ultra-high molecular weight polyalphaolefin;
cryogrinding the ultra-high molecular weight polyalphaolefin to form a cryoground polyalphaolefin having a cryoground polyalphaolefin weight; and
contacting the cryoground polyalphaolefin with at least one water insoluble alcohol for a period of time and at a temperature sufficient to form an alcohol absorbed polyalphaolefin having an alcohol absorbed polyalphaolefin weight that is at least 0.5% greater than the polyalphaolefin weight.
2. The process of claim 1 , wherein the at least one alcohol is selected from the group consisting of 1-pentanol, 1-hexanol, 1-heptanol, n-octyl alcohol, n-nonyl alcohol, 1-decanol, and mixtures thereof.
3. The process of claim 2 , wherein the period of time is at least one hour and the temperature is at least 10° C.
4. The process of claim 2 , wherein the period of time is at least seven days and the temperature is at least 20° C.
5. The process of claim 2 , wherein the period of time is at least twenty eight days and the temperature is at least 20° C.
6. The process of claim 1 , wherein the at least one alcohol is 1-pentanol.
7. The process of claim 1 , wherein the at least one alcohol is 1-hexanol.
8. The process of claim 1 , wherein the at least one alcohol is 1-heptanol.
9. The process of claim 1 , wherein the at least one alcohol is n-octyl alcohol.
10. The process of claim 1 , wherein the at least one alcohol is n-nonyl alcohol.
11. The process of claim 1 , wherein the at least one alcohol is 1-decanol.
12. A drag reducing agent comprising an alcohol absorbed polyalphaolefin, the alcohol absorbed polyalphaolefin including a cryoground polyalphaolefin having a cryoground polyalphaolefin weight and a water insoluble alcohol, wherein the alcohol absorbed polyalphaolefin includes an alcohol absorbed polyalphaolefin weight that is at least 0.5% greater than the cryoground polyalphaolefin weight.
13. The drag reducing agent of claim 12 , wherein the at least one alcohol is selected from the group consisting of 1-pentanol, 1-hexanol, 1-heptanol, n-octyl alcohol, n-nonyl alcohol, 1-decanol, and mixtures thereof.
14. The drag reducing agent of claim 12 , wherein the at least one alcohol is 1-pentanol.
15. The drag reducing agent of claim 12 , wherein the at least one alcohol is 1-hexanol.
16. The drag reducing agent of claim 12 , wherein the at least one alcohol is 1-heptanol.
17. The drag reducing agent of claim 12 , wherein the at least one alcohol is n-octyl alcohol.
18. The drag reducing agent of claim 12 , wherein the at least one alcohol is n-nonyl alcohol.
19. The drag reducing agent of claim 12 , wherein the at least one alcohol is 1-decanol.
20. A process for reducing drag in a conduit, comprising:
forming a drag reducing agent comprising an alcohol absorbed polyalphaolefin, wherein the alcohol absorbed polyalphaolefin is formed by
contacting an alpha olefin monomer with at least one catalyst in a reactant mixture,
polymerizing the alpha olefin monomer, wherein during the polymerization at least a portion of the alpha olefin monomer polymerize in the reactant mixture to provide an ultra-high molecular weight polyalphaolefin,
cryogrinding the ultra-high molecular weight polyalphaolefin to form a cryoground polyalphaolefin having a cryoground polyalphaolefin weight, and
contacting the cryoground polyalphaolefin with at least one water insoluble alcohol to form an alcohol absorbed polyalphaolefin having an alcohol absorbed polyalphaolefin weight that is at least 0.5% greater than the cryoground polyalphaolefin weight; and
introducing the alcohol absorbed polyalphaolefin into the conduit.